Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net Income/(loss)	$ 21.7	$ 29.0	$ (95.0)	$ 64.2
Other Comprehensive income:
Foreign currency translation adjustment	27.2	4.9	(31.1)	(7.6)
Change in pension liability adjustment			(0.1)	(0.3)
Non-cash amortization of interest rate swap expense, net of tax	1.7		1.7
Change in fair value of derivative financial instruments, net of tax	(0.2)	(14.0)	19.3	(2.5)
Total other comprehensive income/(loss):	28.7	(9.1)	(10.2)	(10.4)
Comprehensive income/(loss)	$ 50.4	$ 19.9	$ (105.2)	$ 53.8